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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * V9FS cache definitions. * * Copyright (C) 2009 by Abhishek Kulkarni <adkulkar@umail.iu.edu> */ #ifndef _9P_CACHE_H #define _9P_CACHE_H #ifdef CONFIG_9P_FSCACHE #include <linux/fscache.h> #include <linux/spinlock.h> extern struct fscache_netfs v9fs_cache_netfs; extern const struct fscache_cookie_def v9fs_cache_session_index_def; extern const struct fscache_cookie_def v9fs_cache_inode_index_def; extern void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses); extern void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses); extern void v9fs_cache_inode_get_cookie(struct inode *inode); extern void v9fs_cache_inode_put_cookie(struct inode *inode); extern void v9fs_cache_inode_flush_cookie(struct inode *inode); extern void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *filp); extern void v9fs_cache_inode_reset_cookie(struct inode *inode); extern int __v9fs_cache_register(void); extern void __v9fs_cache_unregister(void); extern int __v9fs_fscache_release_page(struct page *page, gfp_t gfp); extern void __v9fs_fscache_invalidate_page(struct page *page); extern int __v9fs_readpage_from_fscache(struct inode *inode, struct page *page); extern int __v9fs_readpages_from_fscache(struct inode *inode, struct address_space *mapping, struct list_head *pages, unsigned *nr_pages); extern void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page); extern void __v9fs_fscache_wait_on_page_write(struct inode *inode, struct page *page); static inline int v9fs_fscache_release_page(struct page *page, gfp_t gfp) { return __v9fs_fscache_release_page(page, gfp); } static inline void v9fs_fscache_invalidate_page(struct page *page) { __v9fs_fscache_invalidate_page(page); } static inline int v9fs_readpage_from_fscache(struct inode *inode, struct page *page) { return __v9fs_readpage_from_fscache(inode, page); } static inline int v9fs_readpages_from_fscache(struct inode *inode, struct address_space *mapping, struct list_head *pages, unsigned *nr_pages) { return __v9fs_readpages_from_fscache(inode, mapping, pages, nr_pages); } static inline void v9fs_readpage_to_fscache(struct inode *inode, struct page *page) { if (PageFsCache(page)) __v9fs_readpage_to_fscache(inode, page); } static inline void v9fs_uncache_page(struct inode *inode, struct page *page) { struct v9fs_inode *v9inode = V9FS_I(inode); fscache_uncache_page(v9inode->fscache, page); BUG_ON(PageFsCache(page)); } static inline void v9fs_fscache_wait_on_page_write(struct inode *inode, struct page *page) { return __v9fs_fscache_wait_on_page_write(inode, page); } #else /* CONFIG_9P_FSCACHE */ static inline void v9fs_cache_inode_get_cookie(struct inode *inode) { } static inline void v9fs_cache_inode_put_cookie(struct inode *inode) { } static inline void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *file) { } static inline int v9fs_fscache_release_page(struct page *page, gfp_t gfp) { return 1; } static inline void v9fs_fscache_invalidate_page(struct page *page) {} static inline int v9fs_readpage_from_fscache(struct inode *inode, struct page *page) { return -ENOBUFS; } static inline int v9fs_readpages_from_fscache(struct inode *inode, struct address_space *mapping, struct list_head *pages, unsigned *nr_pages) { return -ENOBUFS; } static inline void v9fs_readpage_to_fscache(struct inode *inode, struct page *page) {} static inline void v9fs_uncache_page(struct inode *inode, struct page *page) {} static inline void v9fs_fscache_wait_on_page_write(struct inode *inode, struct page *page) { return; } #endif /* CONFIG_9P_FSCACHE */ #endif /* _9P_CACHE_H */ |